/*
* Copyright (C) 2015 - 2016, Daniel Dahan and CosmicMind, Inc. <http://cosmicmind.io>.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
*	*	Redistributions of source code must retain the above copyright notice, this
*		list of conditions and the following disclaimer.
*
*	*	Redistributions in binary form must reproduce the above copyright notice,
*		this list of conditions and the following disclaimer in the documentation
*		and/or other materials provided with the distribution.
*
*	*	Neither the name of Material nor the names of its
*		contributors may be used to endorse or promote products derived from
*		this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

import UIKit

public class NavigationController : UINavigationController, UINavigationBarDelegate {
	public private(set) lazy var backButton: FlatButton = FlatButton()
	
	public required init?(coder aDecoder: NSCoder) {
		super.init(coder: aDecoder)
	}
	
	public override init(nibName nibNameOrNil: String?, bundle nibBundleOrNil: NSBundle?) {
		super.init(nibName: nibNameOrNil, bundle: nibBundleOrNil)
	}
	
	public override init(rootViewController: UIViewController) {
		super.init(navigationBarClass: NavigationBar.self, toolbarClass: nil)
		setViewControllers([rootViewController], animated: false)
	}
	
	public override func viewDidLoad() {
		super.viewDidLoad()
		prepareBackButton()
		interactivePopGestureRecognizer?.delegate = nil
	}
	
	public override func viewWillLayoutSubviews() {
		super.viewWillLayoutSubviews()
		navigationBar.layoutSubviews()
	}
	
	public override func viewDidAppear(animated: Bool) {
		super.viewDidAppear(animated)
		if let v: UINavigationItem = navigationBar.topItem {
			v.title = ""
			(navigationBar as? NavigationBar)?.layoutNavigationItem(v)
		}
	}
	
	public func navigationBar(navigationBar: UINavigationBar, shouldPushItem item: UINavigationItem) -> Bool {
		item.title = ""
		item.setHidesBackButton(true, animated: false)
		return true
	}
	
	public func navigationBar(navigationBar: UINavigationBar, didPushItem item: UINavigationItem) {
		if let v: NavigationBar = navigationBar as? NavigationBar {
			if var c: Array<UIControl> = item.leftControls {
				c.append(backButton)
				item.leftControls = c
			} else {
				item.leftControls = [backButton]
			}
			v.layoutNavigationItem(item)
		}
	}
	
	internal func handleBackButton() {
		popViewControllerAnimated(true)
	}
	
	private func prepareBackButton() {
		if let v: NavigationBar = navigationBar as? NavigationBar {
			backButton.pulseScale = false
			backButton.pulseColor = MaterialColor.white
			backButton.setImage(v.backButtonImage, forState: .Normal)
			backButton.setImage(v.backButtonImage, forState: .Highlighted)
			backButton.addTarget(self, action: "handleBackButton", forControlEvents: .TouchUpInside)
		}
	}
}
